Friday, 23 October 2026
International edition · English
Surprising but verified science: natural phenomena, geographic records, dark skies and the physiology of altitude.
14 articles · RSS
In summer, some snowfields in the Alps, the Pyrenees or the Arctic turn pink. It is not dust or pollution: it is microscopic algae with their own 'sunscreen'. And their colour has consequences.
It lives only in the canals of Xochimilco, in Mexico City, never loses its juvenile look and can regrow legs, tail and even parts of organs. While it thrives in labs and aquariums, in the wild it is on the brink of extinction.
Our store · NMshop
Hiking footwear, jackets, backpacks, camping and climbing gear chosen for the mountains. Shipping worldwide.
NMshop is the outdoor gear store run by the publisher of Altavia.
